JP3071616B2 - Automatic notification device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic notifying device for notifying an abnormality of gas, water, electricity, etc., security and meter reading data to a center via a communication line.

[0002]

2. Description of the Related Art As an apparatus of this kind, for example,
As described in JP-A-73910, a system has been developed in which an LPG seller installs a LPG consumer and notifies a center. This system will be described with reference to FIG.

In FIG. 1, 1 is an automatic notification device, 2 is a microcomputer gas meter controlled by a microprocessor, 3
Is a gas leak detector, 4 is a telephone, 5 is a center, 6 is a public communication network, and 7 and 8 are subscriber lines connected to the public communication network 6. The automatic notification device 1 is installed in each home where it is consumed, and is connected to the telephone 4 or to the subscriber line 7.

A not-shown exchange or a DC 48 V in the public communication network 6 connected to the subscriber line 7 is supplied, and when calling a terminal device connected to the subscriber line 7, it is superimposed on the DC 48. About 75 V, 16 Hz. In the terminal device (telephone), this 16 Hz, 75
When a call signal of V is detected and the telephone goes off-hook, a direct current flows through the telephone by the voltage of 75 V DC supplied from the exchange, and the exchange stops the transmission of the call signal upon detecting that this current has flown, and performs communication. To start.

When a call is made from the telephone 4,
When the handset of the telephone is lifted and put into an off-hook state, a current flows by 48 V DC supplied from the exchange,
Detecting that this current is flowing, it waits for the next dial signal sent from the telephone, and connects to the subscriber based on the received dial signal.

The automatic notification device 1 includes a microcomputer gas meter 2
The determination is made based on the data from the gas leak detector 3 and the detection result from the gas leak detector 3. When starting the report, the automatic reporting device determines whether or not the subscriber line 7 is in use and whether or not the telephone is being called from the exchange. As with starting communication from the phone,
And off-hook, then it sends the dial signal of the center 5 sends the report data in a line center and the line is connected to the center 5.

[0007]

As described above, conventionally, only the telephone 4 and the automatic notification device 1 are connected to the subscriber line 7 from the public communication network 6. This configuration is sufficient for a general house, but in an apartment or an apartment, it is more efficient to connect a plurality of automatic reporting devices to one subscriber line.

When a plurality of automatic reporting devices are connected to a subscriber line at the same time, the DC resistance of the terminal device viewed from the subscriber line decreases, and the capacitance increases. A standard has been established to prevent operation. SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic reporting device which satisfies the standard even if a plurality of automatic reporting devices are connected to the subscriber line at the same time and can report to the center.

[0009]

Means adopted by the present invention to solve the above-mentioned problems will be described. In an automatic reporting device that reports abnormalities such as gas flow, security, meter reading data, etc. to the center via a communication line, a call is made to the communication line.
A ringing signal detector that detects whether a signal is being transmitted
And OFF for detecting whether the communication line is in use or not.
A hook detector for detecting the call signal with respect to the communication line.
A first part that simultaneously contacts and separates the output part and the off-hook detection part;
A contact and an interface for communication signals with respect to the communication line.
With the second contact that separates and separates the interface part that performs
A report request is issued to the configured switch and the center
When the first contact, the call signal detection unit and
Connecting the off-hook detection unit to the communication line,
The calling signal detecting unit connected to the communication line detects a calling signal.
No detection and the off-hook detector is in use
Is not detected, the second contact connects to the communication line.
Report data via the connected interface unit
A control unit for controlling transmission to the center.
The first contact may bypass the off-hook detection unit.
Disconnect from the communication line by
Characterized that you connected to the communication line by solving the scan.

[0010]

It is determined whether or not a call signal is transmitted to the communication line.
The ringing signal detector to be detected and whether the communication line is in use
Off-hook detection unit that detects
A first contact that comes in contact with and separates from the
The interface section that performs the interface
A switch configured with the second contact. Control unit
The first contact when a notification request to the center occurs
Call signal detector and off-hook detector to the communication line.
And the call signal detector connected to the communication line
No signal is detected and the off-hook detector is in use
Interface is not detected by the second contact.
Control the switch to connect to the communication line and
Data to the center. The first contact is off-hook
Disconnect from communication line by bypassing detector
And connect to the communication line by releasing the bypass.
Swelling.

As described above , a report request to the center occurs.
The first contact contacts the off-call signal detector and the off-
Connected to the communication line.
The ringing signal detector detects no ringing signal and detects off-hook.
When it is not detected that the outlet is in use,
The interface unit is connected to the communication line through the first connection.
The point is communicated by bypassing the off-hook detector.
Communicate by disconnecting from the communication line and breaking the bypass
A report request is issued because it is connected to the line
When the call signal detector is disconnected from the communication line
Not only does the capacitance increase, but also the off-hook detector
Are separated from communication lines by bypass and
The cascade connection of the mobile notification device becomes possible, and notification is made from the communication line.
The resistance value seen at the device does not decrease.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of the embodiment, and FIG. 2 is an operation flowchart of the embodiment. In FIG. 1, reference numeral 1 denotes an automatic notification device, and a plurality of (# 1 to #n) automatic notification devices 1 and telephones 4 are connected to the same subscriber line 7.

The automatic notification device 1 processes data such as a switch 11 for disconnecting the automatic notification device 1 from the subscriber line 7, data from a microcomputer gas meter (not shown), and gas leak detection data from a gas leak detector, and sends it to the center. A control unit 12 for controlling the notification of the communication, and an interface (I / I / O) for interfacing the data transmitted from the control unit 12 with the subscriber line 7
F) a unit 13, a call signal detecting unit 14 for detecting whether or not a call signal is transmitted from the exchange to the subscriber line 7, and an off-hook detecting unit 15 for detecting whether or not the subscriber line 7 is in use. Is configured.

The detection of a call signal by the call signal detection section 14 is determined by whether or not a call signal of 16 Hz is detected. Whether the subscriber line is in use or not in the off-hook detection unit 15 is determined based on the voltage value of the subscriber line.

That is, a DC 4 is supplied to the subscriber line from the exchange.
8V is supplied. When the telephone 4 and the automatic reporting device connected to the subscriber line are not communicating, the impedance is infinite, but the voltage input to the automatic reporting device is 48V. However, if the automatic reporting device or the telephone is communicating, it goes off-hook, current flows, and the DC voltage at the input terminal of the automatic reporting device is reduced. That is, in the exchange, a resistor is inserted so that the current flowing in the off-hook state is about 30 mA. Due to this resistance and the resistance of the subscriber line, the input becomes about 10 V at the input terminal of the automatic notification device. Therefore, if the voltage of the subscriber line is 20
If the voltage is equal to or lower than V, the off-hook detecting unit 15 determines that the communication is not being performed, and if the voltage is equal to or more than 20 V, it is determined that the communication is not being performed.

Next, the operation will be described with reference to FIG. The switch 11 is normally off and the automatic notification device 1 is disconnected from the subscriber line 7. In step S1, the control unit 12 determines whether a notification event to the center has occurred while processing data input from a microcomputer gas meter or the like (not shown). If the determination result is NO, YE
Wait until S is reached.

In step S2, the control unit 12 instructs the switch 11 to be closed, and based on this instruction, the switch 1 is closed and the automatic notification device 1 is connected to the subscriber line 7. In step S3, the control unit 12 determines whether or not the call signal is detected by the call signal detection unit 14. If the determination result is YES, the process proceeds to step S7, and if the result is NO, the process proceeds to step S4.

In step S4, the control unit 12 determines whether the off-hook detection unit 15 is off-hook, that is, in communication, and if the determination result is YES, the control unit 12 proceeds to step S7.
On the other hand, in the case of NO, the process moves to step S5. In step S5, the control unit 12 instructs the I / F unit 13 to enter an off-hook state, subsequently sends a dial signal to set a line to the center, and sends report data after the line is set. . When the notification is completed, it goes on-hook.

In step S6, when the notification is completed, the control unit 13 instructs the switch 11 to open and disconnect the automatic notification device 1 from the subscriber line 7. Then, step S
Moving to 1, the steps S1 to S6 are repeated. When the determination results in steps S3 and S4 are NO, the process proceeds to step S7. In step S7, the control unit 12 instructs the switch 11 to open the switch, and then proceeds to step S8 for a predetermined time. Thereafter, the process proceeds to step S1.

Next, the operation of the second embodiment will be described with reference to FIG. The configuration of the second embodiment is the same as the configuration of the above-described embodiment. Steps S1 to S6 of the operation of the second embodiment shown in FIG. 3 are all the same as the operation of the embodiment described in FIG.

In the second embodiment, steps S3 and S3
If the decision result in the step 4 is YES , the process shifts to a step S3 to repeat and wait until the decisions in the steps S3 and S4 become NO. That is, from # 1 to # described in FIG.
The n automatic notification devices 1 are hardly connected to the subscriber line 7 with the switch 11 closed at the same time. Therefore,
Even if two or three automatic notification devices are connected at the same time, communication is within the connection standard for the subscriber line 7 and communication can be performed.

[0022] Next, with reference to FIG. 4, the switch 11
A specific example will be described. In FIG. 4, the switch 11 is a subscriber.
Connected to the common terminal connected to the telephone line 7 and the calling signal detection unit 14.
Connected normally-open fixed terminal and output of off-hook detector 15
Contact 11 comprising a normally closed fixed terminal connected to
a, a common terminal connected to the subscriber line 7 and the I / F unit 13
Contact 11 comprising a normally open fixed terminal connected to
b, the common terminals of both contacts are interconnected
Is connected to the input of the off-hook unit 15. What
In the figure, the control unit 12, the I / F unit 13, and the call signal detection
The outlet 14 is as described in FIG. In FIG.
The off-hook detection unit 15 receives no command from the control unit 12 and
The switch 11 is in the state shown in FIG.
The movable contact of the second contact 1a is on the normally closed fixed terminal side
At this time, the input / output of the off-hook detection unit 15 is bypassed.
And subscriber line 7 is directly connected to the next automatic reporting device
Is done.

Therefore, in this state, the I / F 13 and the call
Both outgoing signal detector 14 and off-hook detector 15
It is not connected to the subscriber line 7. To the command of the control unit 12
Therefore, the switch 11 is switched in the opposite direction from the state shown in the figure.
Then, the I / F unit 13 and the call signal detecting unit 14
The off-hook detector 15 is connected directly to the
When the path is released, the subscriber line 7 is connected.

The off-hook detection unit 15 is an automatic reporting device #
When one of the automatic notification devices # 2 to #n and one of the telephones cascade- connected to 1 goes off-hook, an off-hook current flows from the input line a of the off-hook detection unit 15 to the output line b shown in FIG. The off-hook detection unit 15 determines that an off-hook state is established when a current flows from the input line a to the output line b.

The operation of control unit 12 is similar to that described with reference to FIGS. In the configuration shown in FIGS. 1 and 4, the switch 11 for disconnecting the automatic notification device from the communication line is instructed by the control unit 12 to close the switch, the I / F unit 13, the call signal detection unit 14, and the off-hook detection. The unit 15 is connected to the communication line at the same time.

Therefore, the switch 11 is connected to the I / F unit 13,
The switch signal detecting section 14 and the off-hook detecting section 15 are configured to operate independently of each other. The ring signal detecting section 14 is connected to the communication line only when the control section 12 detects the calling signal. If the off-hook detection unit 15 is connected to the communication line only when it is determined whether or not the call is detected, and if the calling signal is not detected and the telephone is not in the off-hook state, the I / F unit 13 is connected to the communication line. A decrease in the impedance of the terminal device as seen from the line can be reduced.

The detection of the calling signal and the detection of the off-hook state are performed in series as an operational flow in the control unit 12, but the detection itself is performed simultaneously. The configuration is I /
The F unit 13 and the call signal detection unit 14 and the off-hook detection unit 15 are configured to operate independently. When the detection of the call signal and the detection of the off-hook state are performed, the call signal detection unit 14 and the off-hook detection unit 15 May be connected to a communication line, and the I / F unit 13 may be connected to the communication line when no call signal is detected and the telephone is not in an off-hook state.

While the embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various changes can be made in accordance with the gist of the invention.

[0029]

As described above, according to the present invention, the following effects can be obtained. Call signal when no report request occurs
The detection unit is disconnected from the communication line and the capacitance increases.
Not only is there no
Cascade connection of multiple automatic reporting devices that are disconnected from the communication line
Connection becomes possible, and the resistance value when the
Since it does not decrease, even if a plurality of automatic reports are connected to the communication line, the standard can be satisfied and a report to the center can be made.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is an operation flowchart of the embodiment.

FIG. 3 is an operation flowchart of a second embodiment of the present invention.

FIG. 4 is a configuration diagram of a specific example of the switch of the present invention.

FIG. 5 is a system configuration diagram of an automatic notification system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic notification apparatus 4 Telephone 5 Center 6 Public communication network 7 Subscriber line 11 Switch 12 Control part 13 Interface (I / F) part 14 Call signal detection part 15 Off-hook detection part

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-1-151353 (JP, A) JP-A-1-258543 (JP, A) JP-A-2-1404062 (JP, A) JP-A-3-153 186050 (JP, A) JP-A-4-135358 (JP, A) JP-A-4-346551 (JP, A) JP-A-5-207182 (JP, A) JP-A-6-152736 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04M 11/00-11/10 H04Q 9/00-9/16

Claims (1)

(57) [Claims] An automatic reporting device for reporting an abnormality such as gas flow, security and meter reading data to a center via a communication line, and detects whether a call signal is transmitted to the communication line.
A call signal detector for detecting whether the communication line is in use or not.
A call detection unit, the call signal detection unit and the
A first contact for simultaneously contacting and separating a hook detection unit;
An interface that interfaces communication signals to the line
A switch constituted by a second contact for connecting and disconnecting the face portion.
And the first contact point when a notification request to the center occurs.
The call signal detection unit and the off-hook detection unit
Connected to the communication line, before being connected to the communication line
The paging signal detection unit does not detect a paging signal and the
When the lock detection unit does not detect that the
The interface connected to the communication line by two contacts
The center to detect the report data via the
And a control unit for controlling so that said first contact, bypasses the hook detection unit
Disconnect from the communication line
Automatic reporting device comprising a call to be connected to the communication line by solving.